THESAURUS
doer
activist, ball of fire, beaver, big-time operator, bustler, busy bee, eager beaver, enthusiast, go-getter, human dynamo, hustler, live wire, man of action, man of deeds, militant, new broom, operator, political activist, powerhouse, take-charge guy, wheeler-dealer, winner
ROGET THESAURUS
doer
Agent
N
doer, actor, agent, performer, perpetrator, operator, executor, executrix, practitioner, worker, stager, bee, ant, working bee, termite, white ant, laboring oar, servant of all work, factotum, workman, artisan, craftsman, handicraftsman, mechanic, operative, working man, laboring man, demiurgus, hewers of wood and drawers of water, laborer, navvy, hand, man, day laborer, journeyman, charwoman, hack, mere tool, beast of burden, drudge, fag, lumper, roustabout, maker, artificer, artist, wright, manufacturer, architect, builder, mason, bricklayer, smith, forger, Vulcan, carpenter, ganger, platelayer, blacksmith, locksmith, sailmaker, wheelwright, machinist, mechanician, engineer, sempstress, semstress, seamstress, needlewoman, workwoman, tailor, cordwainer, minister, servant, representative, coworker, party to, participator in, particeps criminis, dramatis personae, personnel, quorum pars magna fui, faber est quisque fortunae suae.